That's interesting that you found relief from DC by taking Vitamin B complex.
I've read a lot on Dupuytren's Contracture as I showed the first signs of it when I turned 40, it slowly progressed until I had trouble putting a glove on my right hand by the time I turned 60, as an avid motorcyclist I needed it fixed.
After much research I found a surgeon in Germany who was available at short notice to do Needle Aponeurotomy on my hand, it's a procedure where they use a sharp needle to cut the cords which form in the palm of the hand and then straighten the finger(s), all done under a local anesthetic and in about 15 minutes. I was able to use my hand the same day and had virtually no discomfort at all.
They gave me a glove with finger splints to wear at night for 6 months to help keep the fingers straight, that was 3.5 years ago and the cords have started to form again, not bad but I can feel them starting, so maybe I'll try the Vitamin B program and see if anything changes.
David